He worked for two and a half weeks, then the warm and neutral light stopped turning on. A week later, the cold light stopped turning on. It can be seen that one LED burned out. Seller's answer: send a faulty lamp at your own expense to our warehouse, we will check if the factory defect is confirmed, we will send you a new one. Shipping to me will cost half the cost of the lamp. I decided not to bother, bought a new one in a retail store in my city. I made a conclusion for myself: do not buy electronic / electrical appliances on marketplaces. Guarantees, it can be considered, there is no.